JP5907143B2 - Lighting device - Google Patents

Lighting device Download PDF

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Publication number
JP5907143B2
JP5907143B2 JP2013220437A JP2013220437A JP5907143B2 JP 5907143 B2 JP5907143 B2 JP 5907143B2 JP 2013220437 A JP2013220437 A JP 2013220437A JP 2013220437 A JP2013220437 A JP 2013220437A JP 5907143 B2 JP5907143 B2 JP 5907143B2
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light guide
light
opening
end surface
longitudinal direction
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JP2015082438A (en
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忠沖 市川
忠沖 市川
陽一 松岡
陽一 松岡
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Toyoda Gosei Co Ltd
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Toyoda Gosei Co Ltd
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0058—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q3/00—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors
    • B60Q3/20—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors for lighting specific fittings of passenger or driving compartments; mounted on specific fittings of passenger or driving compartments
    • B60Q3/217—Doors, e.g. door sills; Steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q3/00—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors
    • B60Q3/60—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors characterised by optical aspects
    • B60Q3/62—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors characterised by optical aspects using light guides
    • B60Q3/64—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors characterised by optical aspects using light guides for a single lighting device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q3/00—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors
    • B60Q3/70—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors characterised by the purpose
    • B60Q3/78—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors characterised by the purpose for generating luminous strips, e.g. for marking trim component edges
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0005—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being of the fibre type
    • G02B6/001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being of the fibre type the light being emitted along at least a portion of the lateral surface of the fibre
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0073—Light emitting diode [LED]
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Planar Illumination Modules (AREA)
  • Arrangements Of Lighting Devices For Vehicle Interiors, Mounting And Supporting Thereof, Circuits Therefore (AREA)

Description

本発明は照明装置に係り、詳しくは、長尺物の導光体を備えた照明装置に関するものである。   The present invention relates to an illuminating device, and more particularly to an illuminating device including a long light guide.

特許文献１には、インストルメントパネルに導光性を有する長尺物の照明部材を配置した車室内の照明装置であって、インストルメントパネルの上側部分を構成するアッパ部に溝部が形成され、溝部は下方に開口され、溝部の内部に照明部材が収容され、溝部の開口部分にカバー体が取付固定され、照明部材の放射光は溝部の開口部分からカバー体を透過して外部へ照射される技術が開示されている。   Patent Document 1 is a lighting device in a vehicle interior in which a long illumination member having a light guide property is arranged on an instrument panel, and a groove is formed in an upper part that constitutes an upper part of the instrument panel. The groove portion is opened downward, the illumination member is accommodated inside the groove portion, the cover body is attached and fixed to the opening portion of the groove portion, and the emitted light of the illumination member is transmitted through the cover body from the opening portion of the groove portion and irradiated to the outside. The technology is disclosed.

特許文献２には、長尺な導光体と、導光体の長手方向の端面に光を入射させる光源とを備えた自動車用照明装置であって、導光体はハウジングに収容され、ハウジングはモールに取り付けられ、導光体の放射光はハウジングとモールとから構成される開口部分から外部へ照射される技術が開示されている。   Japanese Patent Application Laid-Open No. 2004-260688 discloses an automotive lighting device that includes a long light guide and a light source that causes light to enter the longitudinal end face of the light guide, and the light guide is accommodated in a housing. Has been disclosed in which a light guide is emitted to the outside through an opening formed by a housing and a molding.

特許第４７３７２４１号公報Japanese Patent No. 4737241 特許第５２２５７４４号公報Japanese Patent No. 5225744

特許文献１の技術では、前記照明部材の長手方向において、前記照明部材と前記溝部の開口部分との距離（前記照明部材と前記カバー体との距離）が一定になるように構成されている。
従って、前記照明部材の放射光の照射範囲（照射領域）の形状は、前記溝部の開口部分の形状（長尺矩形状）に相似したものになり、その照射範囲内の照度が均一であるため、照射範囲の内と外とでは照度差（明暗差）が大きくなる。
そのため、特に、前記照明部材と照射対象物とが極近い場合には、その照射対象物に照射範囲の境界が明瞭に映り込んでしまい、間接照明による柔らかな質感の照明効果が損なわれるという問題がある。 In the technique of Patent Document 1, the distance between the illumination member and the opening of the groove (the distance between the illumination member and the cover body) is constant in the longitudinal direction of the illumination member.
Therefore, the shape of the irradiation range (irradiation region) of the radiated light of the illumination member is similar to the shape of the opening of the groove (long rectangular shape), and the illuminance within the irradiation range is uniform. The illuminance difference (brightness / darkness difference) increases between the inside and outside of the irradiation range.
Therefore, especially when the illumination member and the irradiation object are very close, the boundary of the irradiation range is clearly reflected in the irradiation object, and the lighting effect of the soft texture by indirect illumination is impaired. There is.

特許文献２の技術では、前記導光体の長手方向において、前記導光体と前記開口部分との距離が一定になるように構成されている。
従って、前記導光体の放射光の照射範囲の形状は、前記開口部分の形状（長尺矩形状）に相似したものになり、その照射範囲内の照度が均一であるため、照射範囲の内と外とでは照度差が大きくなる。
そのため、特に、前記導光体と照射対象物とが極近い場合には、その照射対象物に照射範囲の境界が明瞭に映り込んでしまい、間接照明による柔らかな質感の照明効果が損なわれるという問題がある。 In the technique of Patent Document 2, the distance between the light guide and the opening is constant in the longitudinal direction of the light guide.
Accordingly, the shape of the irradiation range of the radiated light of the light guide is similar to the shape of the opening (long rectangular shape), and the illuminance within the irradiation range is uniform. The difference in illumination between the outside and outside increases.
Therefore, especially when the light guide and the irradiation object are very close, the boundary of the irradiation range is clearly reflected in the irradiation object, and the lighting effect of soft texture by indirect illumination is impaired. There's a problem.

近年、照射範囲が長尺線状の間接照明では、照射範囲の長手方向の端部に向かうに連れて、照度を徐々に低下させると共に、照射範囲の短手方向の幅を徐々に狭くすることにより、間接照明による照明効果を高めることが要求されている。   In recent years, in indirect illumination with a long irradiation area, the illuminance is gradually decreased and the width of the irradiation area in the short direction is gradually narrowed toward the end of the irradiation area in the longitudinal direction. Therefore, it is required to enhance the lighting effect by indirect lighting.

本発明は前記問題を解決するためになされたものであって、その目的は、間接照明による照明効果を高めることが可能な照明装置を提供することにある。   The present invention has been made to solve the above problems, and an object of the present invention is to provide an illuminating device capable of enhancing the illumination effect by indirect illumination.

本発明者らは前記課題を解決するために鋭意検討を重ねた結果、下記のように本発明の各局面に想到した。   As a result of intensive studies in order to solve the above-mentioned problems, the present inventors have arrived at each aspect of the present invention as follows.

＜第１の局面＞
第１の局面は、
光を放射する光源と、
光源の放射光が入射される基端面と、その基端面の反対側の端面である先端面とを有し、基端面から先端面へ向けて光を導光する長尺物の導光体と、
遮光性を有すると共に、導光体の形状に対応した開口部を有し、その開口部の内部に導光体が収容された取付部材と
を備えた照明装置であって、
導光体の長手方向において、先端面の側に向かうに連れて、導光体と開口部との距離が徐々に大きくなるように、導光体が湾曲した形状である。 <First aspect>
The first aspect is
A light source that emits light;
A light guide of a long object having a base end surface on which emitted light of a light source is incident and a front end surface that is an end surface opposite to the base end surface and guiding light from the base end surface toward the front end surface; ,
A lighting device having a light shielding property and having an opening corresponding to the shape of the light guide, and an attachment member in which the light guide is accommodated inside the opening,
In the longitudinal direction of the light guide body, the light guide body has a curved shape so that the distance between the light guide body and the opening gradually increases toward the distal end surface.

第１の局面では、導光体の先端面の側に向かうに連れて、導光体と開口部との距離が徐々に大きくなる（導光体が開口部から遠ざかる）。
一般に、照度は導光体と照射対象物との距離の二乗に反比例するため、導光体から開口部を介して放射される光についても、先端面の側に向かうに連れて徐々に照度が低下することから、その放射光の照射範囲には明るさのグラデーションが生じ、照射範囲の内と外との照度差（明暗差）を小さくできる。
加えて、導光体の先端面の側に向かうに連れて、導光体から開口部を介して導光体の短手方向（長手方向と直交する方向）に放射される光は、取付部材により遮光されて、その照射範囲の幅が徐々に狭く先細り状になるため、その照射範囲の形状は、導光体の長手方向を長軸とする半楕円状になる。 In the first aspect, the distance between the light guide and the opening gradually increases toward the distal end surface side of the light guide (the light guide moves away from the opening).
In general, the illuminance is inversely proportional to the square of the distance between the light guide and the object to be irradiated, so the light emitted from the light guide through the opening gradually decreases as it approaches the front end surface. Therefore, a gradation of brightness occurs in the irradiation range of the radiated light, and an illuminance difference (light / dark difference) between the inside and outside of the irradiation range can be reduced.
In addition, the light emitted from the light guide body in the short direction (direction perpendicular to the longitudinal direction) from the light guide body through the opening as it goes toward the front end surface side of the light guide body is attached to the mounting member. The width of the irradiation range becomes gradually narrower and tapered, so that the shape of the irradiation range becomes a semi-elliptical shape with the longitudinal direction of the light guide as the major axis.

従って、第１の局面では、照射範囲が長尺線状の間接照明にて、照射範囲の長手方向の先端部（導光体の先端面の側に対応した端部）に向かうに連れて、照度を徐々に低下させると共に、照射範囲の短手方向の幅を徐々に狭くすることが可能になり、間接照明の効果を高めることができる。
第１の局面によれば、特に、導光体と照射対象物とが極近い場合でも、その照射対象物に照射範囲の境界が明瞭に映り込むことが無くなり、間接照明による柔らかな質感の照明効果が損なわれるのを防止できる。 Therefore, in the first aspect, as the irradiation range is a long linear indirect illumination, as it goes to the distal end portion in the longitudinal direction of the irradiation range (the end portion corresponding to the distal end surface side of the light guide), It is possible to gradually decrease the illuminance and gradually reduce the width of the irradiation range in the lateral direction, thereby enhancing the effect of indirect illumination.
According to the first aspect, in particular, even when the light guide and the object to be irradiated are extremely close to each other, the boundary of the irradiation range is not clearly reflected on the object to be irradiated. The effect can be prevented from being impaired.

＜第２の局面＞
第２の局面は、第１の局面にて、導光体の長手方向において、基端面の側に向かうに連れて、導光体と開口部との距離が徐々に大きくなるように、導光体が湾曲した形状である。
第２の局面では、導光体の基端面の側に向かうに連れて、導光体と開口部との距離が徐々に大きくなる（導光体が開口部から遠ざかる）。 <Second aspect>
The second aspect is the first aspect, in which the light guide is guided so that the distance between the light guide and the opening gradually increases toward the base end surface in the longitudinal direction of the light guide. The body is curved.
In the second aspect, the distance between the light guide and the opening is gradually increased toward the base end face of the light guide (the light guide is moved away from the opening).

一般に、照度は導光体と照射対象物との距離の二乗に反比例するため、導光体から開口部を介して放射される光についても、基端面の側に向かうに連れて徐々に照度が低下することから、その放射光の照射範囲には明るさのグラデーションが生じ、照射範囲の内と外との照度差を小さくできる。
加えて、導光体の基端面の側に向かうに連れて、導光体から開口部を介して導光体の短手方向に放射される光は、取付部材により遮光されて、その照射範囲の幅が徐々に狭く先細り状になるため、その照射範囲の形状は、導光体の長手方向を長軸とする半楕円状になる。 In general, since the illuminance is inversely proportional to the square of the distance between the light guide and the object to be irradiated, the light emitted from the light guide through the opening gradually increases toward the base end surface. Therefore, a gradation of brightness occurs in the irradiation range of the emitted light, and the difference in illuminance between the inside and the outside of the irradiation range can be reduced.
In addition, light radiated from the light guide body in the short direction of the light guide body through the opening as it goes toward the base end face side of the light guide body is shielded by the mounting member, and its irradiation range Since the width of the light source gradually becomes narrower and tapered, the shape of the irradiation range becomes a semi-elliptical shape with the longitudinal direction of the light guide as the major axis.

従って、第２の局面では、第１の局面の前記作用・効果と相俟って、照射範囲が長尺線状の間接照明にて、照射範囲の長手方向の両端部（導光体の先端面と基端面の両方に対応した端部）に向かうに連れて、照度を徐々に低下させると共に、照射範囲の短手方向の幅を徐々に狭くすることが可能になり、間接照明の効果を高めることができる。   Accordingly, in the second aspect, in combination with the above-described operation and effect of the first aspect, the irradiation range is long-line-shaped indirect illumination, and both ends in the longitudinal direction of the irradiation range (the tip of the light guide) The illuminance is gradually reduced and the width of the irradiation range in the short direction can be gradually reduced toward the edge of the surface corresponding to both the surface and the base end surface. Can be increased.

＜第３の局面＞
第３の局面は、第１の局面または第２の局面において、導光体は、開口部に向かって凸状に湾曲した形状であり、その湾曲部分の光軸が導光体の長手方向の外側に向かって傾斜している。
第３の局面では、第１の局面または第２の局面の前記作用・効果を更に確実に得られる。 <Third aspect>
In a first aspect or a second aspect, the third aspect is a shape in which the light guide is curved convexly toward the opening, and the optical axis of the curved portion is in the longitudinal direction of the light guide. Inclined toward the outside.
In the 3rd situation, the above-mentioned operation and effect of the 1st situation or the 2nd situation can be obtained more certainly.

＜第４の局面＞
第４の局面は、第１〜第３の局面において、導光体の長手方向の中央部分は、導光体と開口部との距離が一定である。
第４の局面では、導光体の長手方向の中央部分から開口部を介して放射される光の照度が高くなるため、その中央部分に対向する照射対象物を明るく照明できる。 <Fourth aspect>
According to a fourth aspect, in the first to third aspects, the distance between the light guide and the opening is constant in the longitudinal central portion of the light guide.
In the fourth aspect, since the illuminance of light emitted from the central portion in the longitudinal direction of the light guide through the opening is increased, the irradiation object facing the central portion can be brightly illuminated.

＜第５の局面＞
第５の局面は、第１〜第４の局面において、導光体の両端部を覆って遮光する遮光部材を備える。
第５の局面では、導光体の両端部の放射光は制御が困難であるため、その放射光を遮光部材により遮光することで、第１〜第４の局面の前記作用・効果が阻害されるのを防止できる。 <5th aspect>
In a first aspect to a fourth aspect, a fifth aspect includes a light shielding member that covers both ends of the light guide and shields light.
In the fifth aspect, since the emitted light at both ends of the light guide is difficult to control, the actions and effects of the first to fourth aspects are inhibited by shielding the emitted light with a light shielding member. Can be prevented.

＜第６の局面＞
第６の局面は、第１〜第５の局面において、開口部を覆うレンズを備える。
第６の局面では、導光体から開口部を介して放射される光をレンズによって制御可能になるため、第１〜第５の局面の前記作用・効果を更に確実に得られる。
また、レンズによって導光体を保護することができる。 <Sixth aspect>
In a first aspect, a sixth aspect includes a lens that covers the opening.
In the sixth aspect, since the light emitted from the light guide through the opening can be controlled by the lens, the functions and effects of the first to fifth aspects can be obtained more reliably.
Further, the light guide can be protected by the lens.

図１（Ａ）は、本発明を具体化した第１実施形態の照明装置１０の概略構成を示す縦断面図。図１（Ｂ）は、照明装置１０の照明範囲を示す平面図。FIG. 1A is a longitudinal sectional view showing a schematic configuration of a lighting apparatus 10 according to a first embodiment that embodies the present invention. FIG. 1B is a plan view showing an illumination range of the illumination device 10. 図２（Ａ）は、照明装置１０，５０の概略構成を示す縦断面図であり、図１（Ａ），図５（Ａ）におけるＸ１−Ｘ１矢示断面図。図２（Ｂ）は、照明装置１０，５０の概略構成を示す縦断面図であり、図１（Ａ），図５（Ａ）におけるＸ２−Ｘ２矢示断面図。2A is a longitudinal sectional view showing a schematic configuration of the lighting devices 10 and 50, and is a sectional view taken along arrows X1-X1 in FIGS. 1A and 5A. FIG. 2B is a longitudinal sectional view showing a schematic configuration of the lighting devices 10 and 50, and is a sectional view taken along arrows X2-X2 in FIGS. 1A and 5A. 図３（Ａ）は、従来の照明装置１００の概略構成を示す縦断面図。図３（Ｂ）は、照明装置１００の照明範囲を示す平面図。FIG. 3A is a longitudinal sectional view illustrating a schematic configuration of a conventional lighting device 100. FIG. 3B is a plan view showing an illumination range of the illumination device 100. 照明装置１００の概略構成を示す縦断面図であり、図３（Ａ）におけるＸ３−Ｘ３矢示断面図。It is a longitudinal cross-sectional view which shows schematic structure of the illuminating device 100, and is X3-X3 arrow sectional drawing in FIG. 3 (A). 図５（Ａ）は、本発明を具体化した第２実施形態の照明装置５０の概略構成を示す縦断面図。図５（Ｂ）は、照明装置５０の照明範囲を示す平面図。FIG. 5A is a longitudinal sectional view showing a schematic configuration of a lighting device 50 according to a second embodiment that embodies the present invention. FIG. 5B is a plan view showing an illumination range of the illumination device 50.

以下、本発明を具体化した各実施形態について図面を参照しながら説明する。尚、各実施形態において、同一の構成部材および構成要素については符号を等しくすると共に、同一内容の箇所については重複説明を省略する。
また、各図面では、説明を分かり易くするために、各実施形態の構成部材の寸法形状および配置箇所を誇張して模式的に図示してあり、各構成部材の寸法形状および配置箇所が実物とは必ずしも一致しないことがある。 Hereinafter, embodiments embodying the present invention will be described with reference to the drawings. In each embodiment, the same constituent members and constituent elements are denoted by the same reference numerals, and redundant description of the same contents is omitted.
Moreover, in each drawing, in order to make the explanation easy to understand, the dimensional shape and arrangement location of the constituent members of each embodiment are schematically illustrated in an exaggerated manner, and the dimensional shape and arrangement location of each constituent member are the real thing. May not always match.

＜第１実施形態＞
図１および図２に示すように、第１実施形態の照明装置１０は、ケース１１（開口部１１ａ）、導光体１２（先端部１２ａ、中央部１２ｂ、基端部１２ｃ、先端面１２ｄ、基端面１２ｅ、放射区間１２ｆ〜１２ｈ、溝１２ｉ）、レンズ１３（開口部１３ａ、表面１３ｂ）、発光部材１４（ＬＥＤ１４ａ、配線基板１４ｂ）などを備え、自動車のドアトリム２０（取付孔２０ａ、表面２０ｂ）に取付固定されている。 <First Embodiment>
As shown in FIGS. 1 and 2, the illumination device 10 according to the first embodiment includes a case 11 (opening 11a), a light guide 12 (a distal end portion 12a, a central portion 12b, a proximal end portion 12c, a distal end surface 12d, A base end face 12e, radiation sections 12f to 12h, a groove 12i), a lens 13 (opening 13a, surface 13b), a light emitting member 14 (LED 14a, wiring board 14b), and the like, and an automobile door trim 20 (mounting hole 20a, surface 20b). ).

ケース１１は、下方に向けて開口部１１ａが形成された略直方体箱状の長尺物であり、遮光性を有する合成樹脂材料の射出成形により一体形成されている。
導光体１２は、断面矩形の角棒状長尺物であり、先端部１２ａ、中央部１２ｂ、基端部１２ｃ、先端面１２ｄ、基端面１２ｅを備え、透明な合成樹脂材料（例えば、アクリル樹脂、ポリカーボネート樹脂など）の射出成形により一体形成されており、ケース１１の内部に取付固定されている。
導光体１２において、先端部１２ａの端面が先端面１２ｄであり、基端部１２ｃの端面が基端面１２ｅである。 The case 11 is a substantially rectangular parallelepiped box-like long object having an opening 11a formed downward, and is integrally formed by injection molding of a synthetic resin material having light shielding properties.
The light guide 12 is a rectangular bar-like long object having a rectangular cross section, and includes a distal end portion 12a, a central portion 12b, a proximal end portion 12c, a distal end surface 12d, and a proximal end surface 12e, and is made of a transparent synthetic resin material (for example, an acrylic resin). , Polycarbonate resin, etc.) and is integrally formed and fixed inside the case 11.
In the light guide 12, the end surface of the distal end portion 12a is the distal end surface 12d, and the end surface of the proximal end portion 12c is the proximal end surface 12e.

導光体１２の中央部１２ｂは、放射区間１２ｆ〜１２ｈを備え、放射区間１２ｆは先端部１２ａ側に配置されて先端部１２ａに接続され、放射区間１２ｈは基端部１２ｃ側に配置されて基端部１２ｃに接続され、放射区間１２ｇは放射区間１２ｆ，１２ｈの間に配置されている。
放射区間１２ｇは略直線形状であり、放射区間１２ｆ，１２ｈは放射区間１２ｇに対して同一方向（ケース１１の開口部１１ａとは反対方向）に緩やかに湾曲した形状である。 The central portion 12b of the light guide 12 includes radiation sections 12f to 12h, the radiation section 12f is disposed on the distal end portion 12a side and connected to the distal end portion 12a, and the radiation section 12h is disposed on the proximal end portion 12c side. Connected to the base end portion 12c, the radiation section 12g is disposed between the radiation sections 12f and 12h.
The radiating section 12g has a substantially linear shape, and the radiating sections 12f and 12h are gently curved in the same direction (the direction opposite to the opening 11a of the case 11) with respect to the radiating section 12g.

導光体１２において、ケース１１の開口部１１ａに対向する表面が光放射面となり、その光放射面と対向する反対面が反射面となる。
導光体１２の反射面には、断面三角形状の溝１２ｉが導光体１２の長手方向に沿って穿設されている。
導光体１２の溝１２ｉの断面形状は、導光体１２の中央部１２ｂの放射区間１２ｇにおいては同一寸法形状である。
また、導光体１２の溝１２ｉの断面形状は、導光体１２の中央部１２ｂの放射区間１２ｆ，１２ｈにおいては、先端部１２ａまたは基端部１２ｃに向かうに連れて、その幅および深さが徐々に小さくなるように形成されている。 In the light guide 12, the surface facing the opening 11 a of the case 11 is a light emitting surface, and the opposite surface facing the light emitting surface is a reflecting surface.
A groove 12 i having a triangular cross section is formed in the reflecting surface of the light guide 12 along the longitudinal direction of the light guide 12.
The cross-sectional shape of the groove 12i of the light guide 12 is the same size and shape in the radiation section 12g of the central portion 12b of the light guide 12.
Further, the cross-sectional shape of the groove 12i of the light guide 12 is such that the width and depth of the radiation sections 12f and 12h of the central portion 12b of the light guide 12 are increased toward the distal end portion 12a or the base end portion 12c. Is formed to gradually become smaller.

レンズ（アウタレンズ）１３は、上方に向けて開口部１３ａが形成された略直方体箱状の長尺物であり、透明または半透明な合成樹脂材料（例えば、アクリル樹脂、ポリカーボネート樹脂など）の射出成形により一体形成されており、レンズの表面１３ｂが下方を向くように、ケース１１の開口部１１ａに嵌合固定されている。   The lens (outer lens) 13 is a substantially rectangular parallelepiped box-like long object having an opening 13a facing upward, and is injection-molded of a transparent or translucent synthetic resin material (for example, an acrylic resin or a polycarbonate resin). And is fixedly fitted to the opening 11a of the case 11 so that the lens surface 13b faces downward.

発光部材１４は、ＬＥＤ（Light Emitting Diode）１４ａと、ＬＥＤ１４ａが実装された配線基板１４ｂとを備え、ケース１１の内部に取付固定されており、車載バッテリ（図示略）から車両のワイヤーハーネス（図示略）を介して直流電源が供給されている。
ＬＥＤ１４ａは、導光体１２の基端面１２ｅに対し、僅かの間隙を空けて対向配置されている。
そのため、ＬＥＤ１４ａの放射光は、導光体１２の基端面１２ｅに入射された後に、導光体１２の内部を先端面１２ｄ側（軸方向先端側）へ向けて導光されながら、導光体１２の溝１２ｉの表面で反射され、導光体１２の各部１２ａ〜１２ｃの表面（光放射面）から外部へ向けて、導光体１２の軸方向に対して略垂直方向に放射される。 The light-emitting member 14 includes an LED (Light Emitting Diode) 14a and a wiring board 14b on which the LED 14a is mounted. The light-emitting member 14 is attached and fixed inside the case 11 and is connected to a vehicle wiring harness (not shown) from an in-vehicle battery (not shown). DC power is supplied via (Omitted).
The LED 14a is disposed to face the base end surface 12e of the light guide 12 with a slight gap.
Therefore, after the light emitted from the LED 14a is incident on the base end surface 12e of the light guide 12, the light guide is guided through the inside of the light guide 12 toward the front end surface 12d (the front end in the axial direction). The light is reflected by the surface of the 12 grooves 12 i and emitted from the surfaces (light emitting surfaces) of the respective portions 12 a to 12 c of the light guide 12 to the outside in a direction substantially perpendicular to the axial direction of the light guide 12.

ドアトリム２０は、貫通形成された長尺矩形状の取付孔２０ａを備え、遮光性を有する合成樹脂材料の射出成形により一体形成されている。
ドアトリム２０にはその裏側から照明装置１０が取付固定され、ドアトリム２０の取付孔２０ａには照明装置１０のレンズ１３が隙間無く嵌合されており、取付孔２０ａからレンズ１３の表面１３ｂが露出し、ドアトリム２０の表面２０ｂとレンズ１３の表面１３ｂとは面一になっている。
尚、レンズ１３の表面１３ｂの平面形状は、導光体１２の形状に対応しているため、ドアトリム２０の取付孔２０ａの平面形状も、導光体１２の形状に対応している。 The door trim 20 includes a long rectangular attachment hole 20a formed therethrough, and is integrally formed by injection molding of a synthetic resin material having a light shielding property.
The lighting device 10 is attached and fixed to the door trim 20 from the back side, and the lens 13 of the lighting device 10 is fitted in the mounting hole 20a of the door trim 20 without a gap, and the surface 13b of the lens 13 is exposed from the mounting hole 20a. The surface 20b of the door trim 20 and the surface 13b of the lens 13 are flush with each other.
In addition, since the planar shape of the surface 13b of the lens 13 corresponds to the shape of the light guide 12, the planar shape of the mounting hole 20a of the door trim 20 also corresponds to the shape of the light guide 12.

照明装置１０では、導光体１２の中央部１２ｂの放射区間１２ｇの長手方向において、導光体１２とレンズ１３の表面１３ｂとの間には僅かの空隙が設けられ、導光体１２とドアトリム２０の取付孔２０ａとの距離（導光体１２とレンズ１３の表面１３ｂとの距離）が一定になるように構成されている。
また、導光体１２の先端部１２ａおよび基端部１２ｃは、ドアトリム２０により覆われている。 In the illumination device 10, a slight gap is provided between the light guide 12 and the surface 13 b of the lens 13 in the longitudinal direction of the radiation section 12 g of the central portion 12 b of the light guide 12. The distance between the 20 mounting holes 20a (the distance between the light guide 12 and the surface 13b of the lens 13) is constant.
The distal end portion 12 a and the proximal end portion 12 c of the light guide 12 are covered with a door trim 20.

そして、導光体１２の中央部１２ｂの放射区間１２ｆの長手方向において、導光体１２の先端面１２ｄ側に向かうに連れて、導光体１２とドアトリム２０の取付孔２０ａとの距離が徐々に大きくなるように（導光体１２がドアトリム２０の取付孔２０ａから遠ざかるように）、放射区間１２ｆにおける湾曲形状が構成されると共に、導光体１２とレンズ１３およびドアトリム２０の取付孔２０ａとの配置が構成されている。   Then, in the longitudinal direction of the radiation section 12 f of the central portion 12 b of the light guide 12, the distance between the light guide 12 and the mounting hole 20 a of the door trim 20 gradually increases toward the distal end surface 12 d side of the light guide 12. The curved shape in the radiation section 12f is formed, and the light guide 12 and the lens 13 and the mounting hole 20a of the door trim 20 are formed so that the light guiding body 12 moves away from the mounting hole 20a of the door trim 20. The arrangement is configured.

また、導光体１２の中央部１２ｂの放射区間１２ｈの長手方向において、導光体１２の基端面１２ｅ側に向かうに連れて、導光体１２とドアトリム２０の取付孔２０ａとの距離が徐々に大きくなるように、放射区間１２ｈにおける湾曲形状が構成されると共に、導光体１２とレンズ１３およびドアトリム２０の取付孔２０ａとの配置が構成されている。   Further, in the longitudinal direction of the radiation section 12 h of the central portion 12 b of the light guide 12, the distance between the light guide 12 and the mounting hole 20 a of the door trim 20 gradually increases toward the base end face 12 e side of the light guide 12. The curved shape in the radiation section 12h is configured so as to be larger, and the arrangement of the light guide 12, the lens 13, and the mounting hole 20a of the door trim 20 is configured.

［第１実施形態の作用・効果］
第１実施形態の照明装置１０によれば、以下の作用・効果を得ることができる。 [Operations and effects of the first embodiment]
According to the illumination device 10 of the first embodiment, the following actions and effects can be obtained.

［１−１］図３および図４に示すように、従来の照明装置１００では、導光体１２の長手方向において、導光体１２とドアトリム２０の取付孔２０ａとの距離が一定になるように構成されている。
その結果、導光体１２からドアトリム２０の取付孔２０ａを介して導光体１２の短手方向（長手方向と直交する方向）に放射される光は、その照射範囲（照射領域）の幅Ｌ３が一定になるため、その照射範囲の形状は、取付孔２０ａの形状に相似した長尺矩形状になり（図３（Ｂ）を参照）、その照射範囲内の照度が均一になることから、照射範囲の内と外とでは照度差（明暗差）が大きくなる。
そのため、特に、導光体１２と照射対象物とが極近い場合には、その照射対象物に照射範囲の境界が明瞭に映り込んでしまい、導光体１２の長手方向に連続的に照射される照射範囲が境界によって突然途切れるように見えることから、間接照明による柔らかな質感の照明効果が損なわれるという問題がある。 [1-1] As shown in FIGS. 3 and 4, in the conventional lighting device 100, the distance between the light guide 12 and the mounting hole 20 a of the door trim 20 is constant in the longitudinal direction of the light guide 12. It is configured.
As a result, the light emitted from the light guide 12 through the mounting hole 20a of the door trim 20 in the short direction (direction perpendicular to the longitudinal direction) of the light guide 12 is the width L3 of the irradiation range (irradiation region). Therefore, the shape of the irradiation range becomes a long rectangular shape similar to the shape of the mounting hole 20a (see FIG. 3B), and the illuminance within the irradiation range becomes uniform. An illuminance difference (brightness / darkness difference) increases between the inside and outside of the irradiation range.
Therefore, especially when the light guide 12 and the irradiation target are very close, the boundary of the irradiation range is clearly reflected in the irradiation target, and the light guide 12 is continuously irradiated in the longitudinal direction. There is a problem in that the illumination effect of soft texture by indirect illumination is impaired because the irradiation range is suddenly interrupted by the boundary.

［１−２］第１実施形態の照明装置１０では、導光体１２の長手方向において、導光体１２の先端面１２ｄ側に向かうに連れて、導光体１２とドアトリム２０（取付部材）の取付孔２０ａ（開口部）との距離が徐々に大きくなる（導光体１２がドアトリム２０の取付孔２０ａから遠ざかる）。
一般に、照度は導光体１２と照射対象物との距離の二乗に反比例するため、導光体１２からドアトリム２０の取付孔２０ａを介して放射される光についても、先端面１２ｄ側に向かうに連れて徐々に照度が低下することから、その放射光の照射範囲には明るさのグラデーションＧａが生じ（図１（Ｂ）を参照）、照射範囲の内と外との照度差を小さくできる。 [1-2] In the illuminating device 10 of the first embodiment, the light guide 12 and the door trim 20 (attachment member) in the longitudinal direction of the light guide 12 toward the distal end surface 12d side of the light guide 12. The distance from the mounting hole 20a (opening) increases gradually (the light guide 12 moves away from the mounting hole 20a of the door trim 20).
In general, since the illuminance is inversely proportional to the square of the distance between the light guide 12 and the irradiation object, the light emitted from the light guide 12 through the mounting hole 20a of the door trim 20 is also directed toward the front end surface 12d. As the illuminance gradually decreases, brightness gradation Ga occurs in the irradiation range of the emitted light (see FIG. 1B), and the illuminance difference between the inside and the outside of the irradiation range can be reduced.

加えて、導光体１２の先端面１２ｄ側に向かうに連れて、導光体１２からドアトリム２０の取付孔２０ａを介して導光体１２の短手方向に放射される光は、ケース１１およびドアトリム２０により遮光されて、その照射範囲の幅Ｌ１，Ｌ２が徐々に狭く先細り状になるため、その照射範囲の形状は、導光体１２の長手方向を長軸Ｍとする半楕円状になる（図１（Ｂ）、図２を参照）。   In addition, the light radiated from the light guide 12 through the attachment hole 20a of the door trim 20 in the short direction of the light guide 12 toward the distal end surface 12d side of the light guide 12 passes through the case 11 and Since the light is shielded by the door trim 20 and the widths L1 and L2 of the irradiation range are gradually narrowed and tapered, the shape of the irradiation range becomes a semi-elliptical shape with the longitudinal direction of the light guide 12 as the major axis M. (See FIGS. 1B and 2).

従って、照明装置１０では、照射範囲が長尺線状の間接照明にて、照射範囲の長手方向の先端部Ｐａ（導光体１２の先端面１２ｄ側に対応した端部）に向かうに連れて、照度を徐々に低下させると共に、照射範囲の短手方向の幅を徐々に狭くすることが可能になり（図１（Ｂ）、図２を参照）、間接照明の効果を高めることができる。
そのため、特に、導光体１２と照射対象物とが極近い場合でも、その照射対象物に照射範囲の境界が明瞭に映り込むことが無くなり、間接照明による柔らかな質感の照明効果が損なわれるのを防止できる。 Therefore, in the illuminating device 10, as the irradiation range moves to the front end portion Pa (the end portion corresponding to the front end surface 12 d side of the light guide 12) in the longitudinal direction of the irradiation range by indirect illumination with a long linear shape. In addition to gradually decreasing the illuminance, it is possible to gradually narrow the width of the irradiation range in the short direction (see FIG. 1B and FIG. 2), and the effect of indirect illumination can be enhanced.
Therefore, even when the light guide 12 and the irradiation object are extremely close to each other, the boundary of the irradiation range is not clearly reflected in the irradiation object, and the lighting effect of the soft texture by indirect illumination is impaired. Can be prevented.

［１−３］照明装置１０では、導光体１２の長手方向において、導光体１２の基端面１２ｅ側に向かうに連れて、導光体１２とドアトリム２０の取付孔２０ａとの距離が徐々に大きくなる。
一般に、照度は導光体１２と照射対象物との距離の二乗に反比例するため、導光体１２からドアトリム２０の取付孔２０ａを介して放射される光についても、基端面１２ｅ側に向かうに連れて徐々に照度が低下することから、その放射光の照射範囲には明るさのグラデーションＧｂが生じ（図１（Ｂ）参照）、照射範囲の内と外との照度差を小さくできる。 [1-3] In the lighting device 10, in the longitudinal direction of the light guide 12, the distance between the light guide 12 and the mounting hole 20a of the door trim 20 is gradually increased toward the base end surface 12e side of the light guide 12. Become bigger.
In general, since the illuminance is inversely proportional to the square of the distance between the light guide 12 and the irradiation object, the light emitted from the light guide 12 through the mounting hole 20a of the door trim 20 is also directed toward the base end face 12e. As the illuminance gradually decreases, a brightness gradation Gb is generated in the irradiation range of the emitted light (see FIG. 1B), and the difference in illuminance between the inside and the outside of the irradiation range can be reduced.

加えて、導光体１２の基端面１２ｅ側に向かうに連れて、導光体１２からドアトリム２０の取付孔２０ａを介して導光体１２の短手方向に放射される光は、、ケース１１およびドアトリム２０により遮光されて、その照射範囲の幅Ｌ１，Ｌ２が徐々に狭く先細り状になるため、その照射範囲の形状は、導光体１２の長手方向を長軸Ｍとする半楕円状になる（図１（Ｂ）、図２を参照）。   In addition, the light radiated from the light guide 12 through the attachment hole 20a of the door trim 20 in the short direction of the light guide 12 toward the base end face 12e side of the light guide 12 is the case 11 Since the light is shielded by the door trim 20 and the widths L1 and L2 of the irradiation range gradually narrow and taper, the shape of the irradiation range is a semi-elliptical shape with the longitudinal direction of the light guide 12 as the major axis M. (See FIG. 1B and FIG. 2).

従って、照明装置１０では、照射範囲が長尺線状の間接照明にて、照射範囲の長手方向の基端部Ｐｂ（導光体１２の基端面１２ｅ側に対応した端部）に向かうに連れて、照度を徐々に低下させると共に、照射範囲の短手方向の幅を徐々に狭くすることが可能になり（図１（Ｂ）、図２を参照）、間接照明の効果を高めることができる。   Therefore, in the illuminating device 10, as the irradiation range is directed to the base end portion Pb (the end portion corresponding to the base end face 12 e side of the light guide 12) in the longitudinal direction of the irradiation range in indirect illumination with a long linear shape. Thus, the illuminance can be gradually reduced, and the width of the irradiation range in the short direction can be gradually reduced (see FIGS. 1B and 2), and the effect of indirect illumination can be enhanced. .

［１−４］導光体１２は、ドアトリム２０（取付部材）の取付孔２０ａ（開口部）に向かって凸状に湾曲した形状であり、その湾曲部分の光軸ＲＡ（導光体１２の光放射面と直交する線）が導光体１２の長手方向の外側に向かって傾斜しているため（図１（Ａ）を参照）、前記［１−２］［１−３］の作用・効果を更に確実に得られる。
換言すれば、導光体１２がドアトリム２０の取付孔２０ａに向かって凹状に湾曲した形状の場合や、導光体１２が階段状に折れ曲がった形状の場合には、前記［１−２］［１−３］の作用・効果を十分に得ることが困難になる。 [1-4] The light guide 12 has a shape curved convexly toward the mounting hole 20a (opening) of the door trim 20 (mounting member), and the optical axis RA of the curved portion (of the light guide 12). Since the line perpendicular to the light emitting surface is inclined outward in the longitudinal direction of the light guide 12 (see FIG. 1A), the above-mentioned operations [1-2] and [1-3] The effect can be obtained more reliably.
In other words, when the light guide 12 is concavely curved toward the mounting hole 20a of the door trim 20, or when the light guide 12 is bent stepwise, the above [1-2] [ It is difficult to sufficiently obtain the operation and effect of 1-3].

［１−５］導光体１２の中央部１２ｂの放射区間１２ｇ（導光体の長手方向の中央部分）は、導光体１２とドアトリム２０の取付孔２０ａとの距離が一定である。
そのため、導光体１２の中央部１２ｂの放射区間１２ｇからドアトリム２０の取付孔２０ａを介して放射される光の照度が高くなるため、放射区間１２ｇに対向する照射対象物を明るく照明できる。 [1-5] The distance between the light guide 12 and the mounting hole 20a of the door trim 20 is constant in the radiation section 12g (the central portion in the longitudinal direction of the light guide) of the central portion 12b of the light guide 12.
Therefore, since the illuminance of the light emitted from the radiation section 12g of the central portion 12b of the light guide 12 through the mounting hole 20a of the door trim 20 is increased, the irradiation object facing the radiation section 12g can be illuminated brightly.

［１−６］導光体１２の先端部１２ａおよび基端部１２ｃは、遮光性を有するドアトリム２０（遮光部材）により覆われている。
導光体１２の両端部（先端部１２ａおよび基端部１２ｃ）の放射光は制御が困難であるため、その放射光をドアトリム２０により遮光することで、前記［１−２］〜［１−５］の作用・効果が阻害されるのを防止できる。 [1-6] The distal end portion 12a and the proximal end portion 12c of the light guide 12 are covered with a door trim 20 (light shielding member) having light shielding properties.
Since it is difficult to control the radiated light at both ends (the distal end portion 12a and the base end portion 12c) of the light guide body 12, the radiated light is shielded by the door trim 20, so that [1-2] to [1- 5] can be prevented from being inhibited.

［１−７］ドアトリム２０の取付孔２０ａにはレンズ１３が隙間無く嵌合されており、取付孔２０ａはレンズ１３によって覆われている。
そのため、導光体１２からドアトリム２０の取付孔２０ａを介して放射される光をレンズ１３によって制御可能になるため、前記［１−２］〜［１−６］の作用・効果を更に確実に得られる。
また、レンズ１３によって導光体１２を保護することができる。 [1-7] The lens 13 is fitted into the mounting hole 20a of the door trim 20 without a gap, and the mounting hole 20a is covered with the lens 13.
Therefore, since the light emitted from the light guide 12 through the mounting hole 20a of the door trim 20 can be controlled by the lens 13, the operations and effects of [1-2] to [1-6] are further ensured. can get.
In addition, the light guide 12 can be protected by the lens 13.

［１−８］導光体１２の溝１２ｉの断面形状は、導光体１２の中央部１２ｂの放射区間１２ｆ，１２ｈにおいては、先端部１２ａまたは基端部１２ｃに向かうに連れて、その幅および深さが徐々に小さくなるように形成されている。
そのため、導光体１２の先端部１２ａまたは基端部１２ｃに向かうに連れて、溝１２ｉで反射される光量を徐々に少なくすることが可能になり、前記［１−２］〜［１−４］の作用・効果を更に高めることができる。 [1-8] The cross-sectional shape of the groove 12i of the light guide 12 is the width of the radial sections 12f and 12h of the central portion 12b of the light guide 12 as it approaches the distal end portion 12a or the base end portion 12c. Further, the depth is gradually reduced.
Therefore, it is possible to gradually reduce the amount of light reflected by the groove 12i toward the distal end portion 12a or the proximal end portion 12c of the light guide 12, and the above [1-2] to [1-4]. ] Can be further enhanced.

＜第２実施形態＞
図２および図５に示すように、第２実施形態の照明装置５０は、ケース１１（開口部１１ａ）、導光体１２（先端部１２ａ、中央部１２ｂ、基端部１２ｃ、先端面１２ｄ、基端面１２ｅ、放射区間１２ｆ〜１２ｈ、１２ｉ）、レンズ１３（開口部１３ａ、表面１３ｂ）、発光部材１４（ＬＥＤ１４ａ、配線基板１４ｂ）、遮光部材５１などを備え、自動車のドアトリム２０（取付孔２０ａ、表面２０ｂ）に取付固定されている。 Second Embodiment
As shown in FIGS. 2 and 5, the illumination device 50 according to the second embodiment includes a case 11 (opening 11 a), a light guide 12 (tip 12 a, center 12 b, base 12 c, tip 12 d, A base end face 12e, radiation sections 12f to 12h, 12i), a lens 13 (opening 13a, surface 13b), a light emitting member 14 (LED 14a, wiring board 14b), a light shielding member 51, and the like, and an automobile door trim 20 (mounting hole 20a). Are fixedly attached to the surface 20b).

第２実施形態の照明装置５０において、第１実施形態の照明装置１０と異なるのは以下の点である。
［ア］導光体１２の中央部１２ｂにおいて、放射区間１２ｇに加えて放射区間１２ｈも略直線形状であり、放射区間１２ｆだけが放射区間１２ｇ，１２ｈに対して一方向（ケース１１の開口部１１ａとは反対方向）に緩やかに湾曲した形状である。 The illumination device 50 according to the second embodiment differs from the illumination device 10 according to the first embodiment in the following points.
[A] In the central portion 12b of the light guide 12, in addition to the radiation section 12g, the radiation section 12h is also substantially linear, and only the radiation section 12f is in one direction with respect to the radiation sections 12g and 12h (the opening of the case 11). 11a) (in the opposite direction).

［イ］導光体１２の中央部１２ｂの放射区間１２ｇ，１２ｈの長手方向において、導光体１２とレンズ１３の表面１３ｂとの間には僅かの空隙が設けられ、導光体１２とレンズ１３の表面１３ｂとの距離が一定になるように構成されている。   [A] A slight gap is provided between the light guide 12 and the surface 13b of the lens 13 in the longitudinal direction of the radiation sections 12g and 12h of the central portion 12b of the light guide 12, and the light guide 12 and the lens It is comprised so that the distance with the surface 13b of 13 may become fixed.

［ウ］遮光部材５１は、導光体１２の基端部１２ｃを覆うように、ケース１１およびレンズ１３に取付固定されている。   [C] The light shielding member 51 is fixedly attached to the case 11 and the lens 13 so as to cover the base end portion 12 c of the light guide 12.

従って、第２実施形態の照明装置５０によれば、第１実施形態の前記［１−２］［１−４］［１−７］［１−８］と同様の作用・効果に加えて、以下の作用・効果を得ることができる。   Therefore, according to the illuminating device 50 of 2nd Embodiment, in addition to the effect | action and effect similar to the said [1-2] [1-4] [1-7] [1-8] of 1st Embodiment, The following actions and effects can be obtained.

［２−１］導光体１２の中央部１２ｂの放射区間１２ｇ，１２ｈは、導光体１２とドアトリム２０の取付孔２０ａとの距離が一定である。
そのため、導光体１２の中央部１２ｂの放射区間１２ｇ，１２ｈからドアトリム２０の取付孔２０ａを介して放射される光の照度が高くなるため、放射区間１２ｇ，１２ｈに対向する照射対象物を明るく照明できる。 [2-1] In the radiation sections 12g and 12h of the central portion 12b of the light guide 12, the distance between the light guide 12 and the mounting hole 20a of the door trim 20 is constant.
Therefore, since the illuminance of light emitted from the radiation sections 12g and 12h of the central portion 12b of the light guide 12 through the mounting hole 20a of the door trim 20 is increased, the irradiation object facing the radiation sections 12g and 12h is brightened. Can be illuminated.

［２−２］導光体１２の先端部１２ａは、遮光性を有するドアトリム２０により覆われている。また、導光体１２の基端部１２ｃは、遮光部材５１により覆われている。
導光体１２の両端部（先端部１２ａおよび基端部１２ｃ）の放射光は制御が困難であるため、その放射光をドアトリム２０および遮光部材５１により遮光することで、前記［１−２］［２−１］の作用・効果が阻害されるのを防止できる。
尚、遮光部材５１は、ドアトリム２０に取り付けられたガーニッシュなどの装飾部材と共用化してもよい。 [2-2] The distal end portion 12a of the light guide 12 is covered with a door trim 20 having a light shielding property. Further, the base end portion 12 c of the light guide 12 is covered with a light shielding member 51.
Since it is difficult to control the radiated light at both ends (the distal end portion 12a and the base end portion 12c) of the light guide 12, the radiated light is shielded by the door trim 20 and the light shielding member 51, thereby [1-2]. It is possible to prevent the action and effect of [2-1] from being inhibited.
The light shielding member 51 may be shared with a decorative member such as a garnish attached to the door trim 20.

＜別の実施形態＞
本発明は前記各実施形態に限定されるものではなく、以下のように具体化してもよく、その場合でも、前記各実施形態と同等もしくはそれ以上の作用・効果を得ることができる。 <Another embodiment>
The present invention is not limited to the above-described embodiments, and may be embodied as follows. Even in this case, operations and effects equivalent to or higher than those of the above-described embodiments can be obtained.

［Ａ］ケース１１を省き、導光体１２をドアトリム２０の内部に直接取付固定してもよい。
［Ｂ］レンズ１３を省き、ドアトリム２０の取付孔２０ａおよびケース１１の開口部１１ａから導光体１２を露出させてもよい。 [A] The case 11 may be omitted, and the light guide 12 may be directly attached and fixed inside the door trim 20.
[B] The lens 13 may be omitted, and the light guide 12 may be exposed from the mounting hole 20 a of the door trim 20 and the opening 11 a of the case 11.

［Ｃ］導光体１２の先端部１２ａを、第２実施形態の遮光部材５１と同様に、ドアトリム２０とは別体に設けた遮光部材やケース１１によって覆うようにしてもよい。   [C] You may make it cover the front-end | tip part 12a of the light guide 12 with the light shielding member and case 11 which were provided separately from the door trim 20 similarly to the light shielding member 51 of 2nd Embodiment.

［Ｄ］前記各実施形態では、導光体１２の中央部１２ｂの放射区間１２ｇが直線形状であるが、放射区間１２ｇを湾曲形状にしてもよく、その場合には、放射区間１２ｇの湾曲形状に合わせて、レンズ１３およびドアトリム２０の取付孔２０ａを湾曲形状にすればよい。   [D] In each of the above embodiments, the radiating section 12g of the central portion 12b of the light guide 12 is linear, but the radiating section 12g may be curved, and in that case, the curved shape of the radiating section 12g is used. Accordingly, the lens 13 and the mounting hole 20a of the door trim 20 may be curved.

［Ｅ］ＬＥＤ１４ａは、どのような光源（例えば、ＥＬ（Electro Luminescence）素子などの半導体発光素子、電球など）に置き換えてもよい。   [E] The LED 14a may be replaced with any light source (for example, a semiconductor light emitting element such as an EL (Electro Luminescence) element, a light bulb, or the like).

［Ｆ］前記各実施形態では、断面矩形の角棒状長尺物の導光体１２を用いたが、導光体１２の断面形状はどのような形状（例えば、断面円形、断面三角形、断面五角形以上の多角形など）にしてもよい。   [F] In each of the above-described embodiments, the rectangular light guide 12 having a rectangular cross section is used. However, the light guide 12 may have any cross section (for example, a circular cross section, a triangular cross section, a pentagonal cross section). The above polygon may be used.

［Ｇ］前記各実施形態では、長手方向に沿って溝１２ｉが穿設された導光体１２を用いたが、溝１２ｉを省き、その代わりに光散乱性の高い材料（例えば、シリカ、酸化チタンなど）の微粒子を導光体１２に含有させ、その微粒子により光を散乱させて導光体１２の光放射面から外部へ光を放射させるようにしてもよい。   [G] In each of the above embodiments, the light guide 12 having the groove 12i formed in the longitudinal direction is used. However, the groove 12i is omitted, and instead, a material having high light scattering properties (for example, silica, oxidation) The light guide 12 may contain fine particles of titanium or the like, and light may be scattered by the fine particles to be emitted from the light emitting surface of the light guide 12 to the outside.

［Ｈ］前記各実施形態の照明装置１０，５０はドアトリム２０に設置されるものであるが、本発明の照明装置は、自動車の車室内のどのような場所（例えば、センターコンソール、インストルメントパネル、ルーフ側トリム、トランクルームのトリム、ピラートリム、ラゲージサイドトリムなど）に設置してもよく、ドアパネル等の車体パネルに直接設置してもよく、具体的な細部構造等については設置場所に応じて適宜変更してもよい。   [H] Although the lighting devices 10 and 50 of each of the above embodiments are installed on the door trim 20, the lighting device of the present invention can be used in any location (for example, a center console, an instrument panel) in a vehicle cabin. , Roof side trims, trunk room trims, pillar trims, luggage side trims, etc.) and may be installed directly on vehicle body panels such as door panels, etc. It may be changed.

［Ｉ］前記各実施形態の照明装置１０，５０は車両の室内照明に適用したものであるが、本発明は車両用に限らず、どのような物品（例えば、電気製品、家具など）の照明に適用してもよく、その場合には、取付部材としてのドアトリム２０を当該物品の外装部材に置き換えればよい。   [I] The lighting devices 10 and 50 of each of the above embodiments are applied to interior lighting of a vehicle. However, the present invention is not limited to a vehicle, and illumination of any article (for example, an electrical product, furniture, etc.). In this case, the door trim 20 as the attachment member may be replaced with the exterior member of the article.

本発明は、前記各局面および前記各実施形態の説明に何ら限定されるものではない。特許請求の範囲の記載を逸脱せず、当業者が容易に想到できる範囲で種々の変形態様も本発明に含まれる。本明細書の中で明示した公報などの内容は、その全ての内容を援用によって引用することとする。   The present invention is not limited to the description of each aspect and each embodiment. Various modifications are also included in the present invention as long as those skilled in the art can easily conceive without departing from the scope of the claims. The contents of publications and the like specified in the present specification are all incorporated by reference.

１０，５０…照明装置
１１…ケース
１２…導光体
１２ｄ…導光体１２の先端面
１２ｅ…導光体１２の基端面
１２ｇ…導光体１２の中央部１２ｂの放射区間（導光体の長手方向の中央部分）
１２ｉ…導光体１２の溝
１３…レンズ
１４…発光部材
１４ａ…ＬＥＤ（光源）
２０…ドアトリム（取付部材、遮光部材）
２０ａ…ドアトリム２０の取付孔（取付部材の開口部）
５１…遮光部材 DESCRIPTION OF SYMBOLS 10,50 ... Illuminating device 11 ... Case 12 ... Light guide 12d ... The front end surface 12e of the light guide 12 ... The base end surface 12g of the light guide 12 ... The radiation | emission area (light guide body 12b) of the center part 12b of the light guide 12 (Longitudinal center)
12i ... Groove 13 of the light guide 12 ... Lens 14 ... Light emitting member 14a ... LED (light source)
20 ... Door trim (mounting member, shading member)
20a: Mounting hole of door trim 20 (opening of mounting member)
51 ... Light-shielding member

Claims (6)

光を放射する光源と、
前記光源の放射光が入射される基端面と、その基端面の反対側の端面である先端面とを有し、前記基端面から前記先端面へ向けて光を導光する長尺物の導光体と、
遮光性を有すると共に、前記導光体の形状に対応した開口部を有し、その開口部の内部に前記導光体が収容された取付部材と
を備えた照明装置であって、
前記導光体の長手方向において、前記先端面の側に向かうに連れて、前記導光体と前記開口部との距離が徐々に大きくなるように、前記導光体が湾曲した形状である照明装置。 A light source that emits light;
A long object that has a proximal end surface on which the emitted light of the light source is incident and a distal end surface opposite to the proximal end surface and guides light from the proximal end surface toward the distal end surface. Light body,
An illumination device having a light shielding property and having an opening corresponding to the shape of the light guide, and an attachment member in which the light guide is accommodated inside the opening,
Illumination in which the light guide is curved so that the distance between the light guide and the opening gradually increases in the longitudinal direction of the light guide toward the distal end side. apparatus. 前記導光体の長手方向において、前記基端面の側に向かうに連れて、前記導光体と前記開口部との距離が徐々に大きくなるように、前記導光体が湾曲した形状である、
請求項１に記載の照明装置。 In the longitudinal direction of the light guide, the light guide is curved so that the distance between the light guide and the opening gradually increases toward the base end surface.
The lighting device according to claim 1. 前記導光体は、前記開口部に向かって凸状に湾曲した形状であり、その湾曲部分の光軸が前記導光体の長手方向の外側に向かって傾斜している、
請求項１または請求項２に記載の照明装置。 The light guide has a shape that is convexly curved toward the opening, and the optical axis of the curved portion is inclined toward the outside in the longitudinal direction of the light guide.
The lighting device according to claim 1 or 2. 前記導光体の長手方向の中央部分は、前記導光体と前記開口部との距離が一定である、
請求項１〜３のいずれか一項に記載の照明装置。 The central portion of the light guide in the longitudinal direction has a constant distance between the light guide and the opening.
The illuminating device as described in any one of Claims 1-3. 前記導光体の両端部を覆って遮光する遮光部材を備えた、
請求項１〜４のいずれか一項に記載の照明装置。 A light shielding member that covers and shields both ends of the light guide,
The illuminating device as described in any one of Claims 1-4. 前記開口部を覆うレンズを備えた、
請求項１〜５のいずれか一項に記載の照明装置。 A lens covering the opening;
The illumination device according to any one of claims 1 to 5.
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